do you think that selfish is the person's essence?

i think that people aren't born like this.they develop such things .some people are very analytical about things in life and this is the approach that makes them selfish and think about themselves.other people are a little carefree and and don't analyse much and this approach makes them appear kind hearted to others.it also depends who matters to you and what matters to you.if someone doesn't matter to us we wont be nice to them even if we want to and if their happiness doesn't matter to us we wont even care to!